CVE-2021-4133

    Dashboard / Vulnerabilities / CVE-2021-4133

    CVE-2021-4133

    Published: 25 Jan 2022Last Modified: 7 Aug 2026

    Summary:

    Details: A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.

    References: https://www.oracle.com/security-alerts/cpuapr2022.html, https://github.com/keycloak/keycloak/issues/9247, https://github.com/keycloak/keycloak/security/advisories/GHSA-83x4-9cwr-5487, https://bugzilla.redhat.com/show_bug.cgi?id=2033602

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 2690229863ddbcdfa2c75e00a7a9858e2e03c6c9
    Fixed -6bfd4549bb1e9a17791849252e1de0d95a9f4012

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-4133 | CVE-DB